On Wed, 2022-11-09 at 21:53 +0800, Xi Ruoyao wrote:
> These patches allow to expand the following builtins to floating point
> instructions for LoongArch:
>
> - __builtin_rint{,f}
> - __builtin_{l,ll}rint{,f}
> - __builtin_{l,ll}floor{,f}
> - __builtin_{l,ll}ceil{,f}
> - __builtin_scalb{n,ln}{,f}
> - __builtin_logb{,f}
>
> Bootstrapped and regtested on loongarch64-linux-gnu. And a modified
> Glibc using the builtins for rint{,f}, {l,ll}rint{,f}, and logb{,f}
> also survived Glibc test suite.
>
> Please review ASAP because GCC 13 stage 1 will end on Nov. 13th.
>
> v1 -> v2: Only use ftint{rm,rp} instructions if floor and ceil are
> allowed to raise inexact exception.
>
> Xi Ruoyao (4):
> LoongArch: Rename frint_<fmt> to rint<mode>2
> LoongArch: Add ftint{,rm,rp}.{w,l}.{s,d} instructions
> LoongArch: Add fscaleb.{s,d} instructions as ldexp{sf,df}3
> LoongArch: Add flogb.{s,d} instructions and expand logb{sf,df}2
>
> gcc/config/loongarch/loongarch.md | 95
> ++++++++++++++++++-
> gcc/testsuite/gcc.target/loongarch/flogb.c | 18 ++++
> gcc/testsuite/gcc.target/loongarch/frint.c | 16 ++++
> gcc/testsuite/gcc.target/loongarch/fscaleb.c | 48 ++++++++++
> .../gcc.target/loongarch/ftint-no-inexact.c | 44 +++++++++
> gcc/testsuite/gcc.target/loongarch/ftint.c | 44 +++++++++
> 6 files changed, 261 insertions(+), 4 deletions(-)
> create mode 100644 gcc/testsuite/gcc.target/loongarch/flogb.c
> create mode 100644 gcc/testsuite/gcc.target/loongarch/frint.c
> create mode 100644 gcc/testsuite/gcc.target/loongarch/fscaleb.c
> create mode 100644 gcc/testsuite/gcc.target/loongarch/ftint-no-
> inexact.c
> create mode 100644 gcc/testsuite/gcc.target/loongarch/ftint.c
>
Pushed r13-3922.
I'll be busy in the following week. Will do the work on Glibc side
after Nov. 20.
--
Xi Ruoyao <xry...@xry111.site>
School of Aerospace Science and Technology, Xidian University
